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针对倾转短舱与机体间的气动干扰和惯性耦合特征,基于拉格朗日原理推导出了倾转旋翼机的纵向飞行动力学方程。在此基础上,以XV-15倾转旋翼机为对象,针对几种不同的短舱倾角,计算分析了飞行器的配平特性和过渡模式动态响应特性。仿真结果表明,所建立的动力学模型是合理的。该模型可用于研究倾转旋翼机的直升机飞行模式、飞机飞行模式及过渡飞行模式下的纵向飞行特性。
Aiming at the aerodynamic interference and inertial coupling between the tilting nacelle and the body, the longitudinal flight dynamics of the tilting rotor is deduced based on the Lagrange principle. On this basis, taking the XV-15 tilting rotorcraft as an example, the balance characteristics of the aircraft and the dynamic response characteristics of the transitional mode are calculated and analyzed for several different nacelle angles. The simulation results show that the established dynamic model is reasonable. The model can be used to study the longitudinal flight characteristics of the rotorcraft helicopter flight mode, aircraft flight mode and transitional flight mode.